Four years ago, Robin Kutchai lost her husband to cancer. “We got the diagnosis that his body was full of tumors two weeks before he died,” she said, perched at the bar of the Woodland Hills Hilton, where she’s temporarily holed up. They had been married 10 weeks after they’d met, 35 years ago. Telling the story, her large, neatly made-up eyes welled with tears.

After her husband’s death, Kutchai sold their Simi Valley house and bought a townhouse in Porter Ranch, where she found a sense of belonging to help her through her grief. “It was always such a wonderful area,” she said. “It was a place where I felt safe being alone.”

That all changed dramatically this past autumn, when the air in the far northwestern San Fernando Valley community became saturated with the rotten-egg smell associated with natural gas — a consequence of a chemical added to the odorless gas to make it detectable.